Sheet-metal pulley-casing.



PATENTED DEC. 17, 1907.

P. E. SLOAN. SHEET METAL PULLEY CASING.

APPLIGATION FILED AUG. 9, 1997.

nozwlioz PATENT OFFICE.

FRANCIS EUGENE SLOAN, OF BALTIMORE, MARYLAND.

SHEET-METAL PULLEY-CASING.

Specification of Letters Patent.

Patented Dec. 17, 1907.

Application filed August 9.1907. Serial No. 387,803.

To all whom it may concern:

Be it known that I, FRANoIs EUGENE SLoAN, a citizen of the UnitedStates, residing at Baltimore, in the State of Maryland, have inventedcertain new and useful Improvements in Sheet-Metal Pulley-Casings, ofwhich the following is a specification.

This invention relates to stamped up sheetmetal pulley casings for sashpulleys.

Considerable trouble is experienced in stamping up from a single blank asash pulley casing that is strong and durable and at the same timeeconomically manufactured.

The object therefore of the present invention is to provide an improvedconstruction of easing formed from a single blank, and possessingstrength and durability to a degree that renders it commerciallypracticable and which may be produced by simple die operations.

The invention consists in the improved construction hereinafterdescribed and claimed reference being made to the accompanying drawingin which Figure 1, shows the blank in the flat form as produced by thefirst die operation. Fig. 2, illustrates a rear elevation of the partlyformed casing as produced by the second die operation. Fig. 3, shows aside elevation of the same. Fig. 4, illustrates a rear view of, thecomplete casing as produced by the third die operation, and also shows apulley mounted therein, and Fig. 5, shows a side elevation of thecomplete casing with the pulley therein.

The first operation of the die cuts a blank 1, from a sheet and forms inthe said blank a central slot 2, and a depression 3, at each side ofsaid slot. These depressions are made from the outer side of the blankso as to produce projections 4, at the inner side of said blank and aperforation 5, is provided in each of said depressions. At the upper andlower edges, the blank is provided with projecting portions 6, and 7,the former being smaller than the latter and having a single perforation8. The opposite side portions 9, in which the projections are formedconstitute the side cheek pieces of the casing and the blank is broadestat a point through the upper portion of the projections which latter areslightly eccentrically located in said side portions for a purposepresently to be described.

The second die operation forms a central fiat face plate portion" 10,and bends the metal laterally from the central face plate so that theopposite side porti0ns'9, will have position at an angle with respect tothe face plate. In making this bend the lower proj ecting portion 7, isturned to an inclined position so as to extend downwardly and laterallyfrom the lower edge 1 1, of the face late, and the surplus metal isuniformly fol ed as it is gathered in. The folding of the metal in thismanner at this point serves to reinforce and greatly stiffen the casingat the lower end which is subjected to the greatest strain.

In "bending the metal of the casing into this form a continuous flangearound the face plate of unequal widths is produced,the narrowestportion of the flange being at the upper end of the casing; theintermediate width of flange being at the lower end of said casing, andthe widest flange portion being between the intermediate and thenarrowest flange portions. I prefer to provide the narrowest flangeportion at the upper end of the casing because of the rigidity itproduces, but I may in some instances omit this narrowest flange portionas the casing is supported mainly by the lower inclined flange portionas will presently be described. .The third die operation completes thecasing and bends the side and bottom inclined portions from theirpositions shown in Fig. 2 to the positions illustrated in Fig. 4. Inmaking this third and last bend the die folds the surplus metal at thelower end into uniform close folds 12, which are rigid, and at the sametime the die leaves said lower end in an inclined position with respectto the face plate 10. Simultaneously with the final folding of the metalat the lower end of the casing the die also produces a depression 13, inthe metal around the perforation 8, at the upper end of the casing. Thiscasing is especially designed for attachment in the mortise of a windowframe by a single screw or equivalent fastening,the fastening howevermerely serving to keep the upper end of the casing from swinging ortilting outwardly while the lower inclined end of the casing will fitthe correspondingly shaped portion of the mortise and said casing ismainly supported by said lower end. The folds 12, in said lower endserve to reinforce said end.

By locating the projections 4, eccentrically in the opposite sideportions 9, said portions, when the pulley 14,1s in position, willproject upwardly at opposite sides of the pulley as at 15, and serve asa guide for the sash cord to prevent the latter from being displacedduring the operations of traveling over the pulley. It is obvious thatthe projections 4, at the inner side of the said portions will lieadjacent the opposite sides of the pulley and prevent the latter fromWabbling in the casing.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is,

1. A sash pulley casing stamped from a single sheet metal blank andhaving a face and parallel side portions extending laterally from theedge of the face and provided with perforations therein and a lower endportion formed integrally with and extending continuously from one sideportion around and merging into the other side portion.

2. A sash pulley casing stamped from a single sheet metal blank andhaving a face, the upper end portion of which is provided with aperforation, parallel perforated side portions formed integrally withand extending laterally from said face and a lower end portion formedintegrally with the face and side portions, and extending continuouslyfrom one side portion around to and merging into the other side portionand said end portion being joined to and bent laterally from the faceand inclining downwardly therefrom.

3. A sash pulley casing stamped from a single sheet metal blank andhaving a face,

parallel side portions formed integrally with and extending laterallyfrom said face and a lower end portion extending continuously from oneside portion around to and merging into the other side portion and themetal of said continuous end portion being provided with folds.

4. A sash pulley casing stamped from a single sheet metal blank andhaving a face, a flange formed integrally with and extending laterallyfrom the edges of said face and forming broad parallel side portions anda narrower rounded lower end portion which is joined to and inclinesdownwardly from the face, and also having an upper perforated portionabove the broad side portions.

5. A sash pulley casing stamped from a single sheet metal blank andhaving a face with a slot therein and a perforation in the face abovethe slot, a lateral flange extending continuously from the edge of saidface and having an irregular width,said flange being narrowest at theupper end of the casing, widest between itsends and of an intermediatewidth at the lower end of the casing and the lowermost end of the flangebeing joined to and inclining downwardly from the ace.

In testimony whereof I aflix my signature in presence of two witnesses.

FRANCIS EUGENE SLOAN. l/Vitnesses:

G. FERDINAND Voer, CHARLns B. MANN, Jr.

